66 lines
3.1 KiB
C++
66 lines
3.1 KiB
C++
/**
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* Copyright (c) 2021 OceanBase
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* OceanBase CE is licensed under Mulan PubL v2.
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* You can use this software according to the terms and conditions of the Mulan PubL v2.
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* You may obtain a copy of Mulan PubL v2 at:
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* http://license.coscl.org.cn/MulanPubL-2.0
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* THIS SOFTWARE IS PROVIDED ON AN "AS IS" BASIS, WITHOUT WARRANTIES OF ANY KIND,
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* EITHER EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO NON-INFRINGEMENT,
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* MERCHANTABILITY OR FIT FOR A PARTICULAR PURPOSE.
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* See the Mulan PubL v2 for more details.
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* This file contains implementation for json_exists.
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*/
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#ifndef OCEANBASE_SRC_SQL_ENGINE_EXPR_OB_EXPR_JSON_EXISTS_H
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#define OCEANBASE_SRC_SQL_ENGINE_EXPR_OB_EXPR_JSON_EXISTS_H
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#include "sql/engine/expr/ob_expr_operator.h"
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#include "lib/json_type/ob_json_tree.h"
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#include "lib/json_type/ob_json_base.h"
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namespace oceanbase
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{
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namespace sql
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{
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class ObExprJsonExists : public ObFuncExprOperator
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{
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public:
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explicit ObExprJsonExists(common::ObIAllocator &alloc);
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virtual ~ObExprJsonExists();
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virtual int calc_result_typeN(ObExprResType& type,
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ObExprResType* types,
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int64_t param_num,
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common::ObExprTypeCtx& type_ctx) const override;
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static int get_path(const ObExpr &expr, ObEvalCtx &ctx, ObJsonPath* &j_path,
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common::ObArenaAllocator &allocator,
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ObJsonPathCache &ctx_cache, ObJsonPathCache* &path_cache);
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static int get_var_data(const ObExpr &expr, ObEvalCtx &ctx, common::ObArenaAllocator &allocator,
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uint16_t index, ObIJsonBase*& j_base);
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static int get_json_data(const ObExpr &expr, ObEvalCtx &ctx, common::ObArenaAllocator &allocator,
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uint16_t index, ObIJsonBase*& j_base, bool &is_null, bool need_to_tree,
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bool need_quote);
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static int get_passing(const ObExpr &expr, ObEvalCtx &ctx, PassingMap &pass_map,
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uint32_t param_num, common::ObArenaAllocator &temp_allocator);
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static int get_error_or_empty(const ObExpr &expr, ObEvalCtx &ctx, uint32_t idx, uint8_t &result);
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static int set_result(ObDatum &res, const ObJsonBaseVector& hit,
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const uint8_t option_on_error, const uint8_t option_on_empty,
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const bool is_cover_by_error, const bool is_null_json);
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static int eval_json_exists(const ObExpr &expr, ObEvalCtx &ctx, ObDatum &res);
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virtual int cg_expr(ObExprCGCtx &expr_cg_ctx, const ObRawExpr &raw_expr,
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ObExpr &rt_expr) const override;
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private:
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const static uint8_t OB_JSON_FALSE_ON_ERROR = 0;
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const static uint8_t OB_JSON_TRUE_ON_ERROR = 1;
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const static uint8_t OB_JSON_ERROR_ON_ERROR = 2;
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const static uint8_t OB_JSON_DEFAULT_ON_ERROR = 3;
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const static uint8_t OB_JSON_FALSE_ON_EMPTY = 0;
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const static uint8_t OB_JSON_TRUE_ON_EMPTY = 1;
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const static uint8_t OB_JSON_ERROR_ON_EMPTY = 2;
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const static uint8_t OB_JSON_DEFAULT_ON_EMPTY = 3;
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DISALLOW_COPY_AND_ASSIGN(ObExprJsonExists);
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};
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} // sql
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} // oceanbase
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#endif // OCEANBASE_SRC_SQL_ENGINE_EXPR_OB_EXPR_JSON_EXISTS_H
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